# Relationship history for MSHA mine 1700783

Current hierarchy: **CRH PLC → Pike Industries Inc → PEP #8 Portable Sand Screen**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** James  Hinman → PEP #8 Portable Sand Screen; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → PEP #8 Portable Sand Screen; 1988-06-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Rock Industries → PEP #8 Portable Sand Screen; 2005-07-13 to 2006-01-16; source msha-controller-operator-history
- **controller_controls_operator:** James  Hinman → Blue Rock Industries; 2005-07-13 to 2006-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries Inc → PEP #8 Portable Sand Screen; 2006-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Pike Industries Inc; 2006-01-17 to current/open; source msha-controller-operator-history